Contribution of free nerve endings in the laryngeal epithelium to CO2 reception in rats

Nishijima, Ken‐ichi; Tsubone, Hirokazu; Atoji, Yasuro

doi:10.1016/j.autneu.2003.11.002

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Cited by 7 publications

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Effects of Hypercapnia on Non-nutritive Swallowing in Newborn Lambs

Duvareille

Samson

St-Hilaire

et al. 2008

Integration in Respiratory Control

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The purpose of this study was to determine the effect of hypercapnia on non-nutritive swallowing (NNS) frequency and on NNS-breathing coordination in newborn lambs. Six lambs were chronically instrumented for recording electroencephalogram, eye movements, diaphragm and thyroarytenoid muscle activity, nasal airflow and electrocardiogram. Each lamb was placed in a Plexiglas chamber and exposed to a hypercapnic gas mixture (21% O2, 5% CO2). Polysomnographic recordings were conducted in non-sedated lambs using a custom-designed radiotelemetry system. Results show that hypercapnia increased NNS frequency in all three states of alertness (p < 0.0001 to 0.03), through a specific increase in ie-type NNS. Causal mechanisms and potential consequences of such observations on aspirations and apneas, as well as on swallowing maturation, will require further studies.

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